CN102900882B - Solenoid valve, solenoid and variable volume pump - Google Patents

Solenoid valve, solenoid and variable volume pump Download PDF

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Publication number
CN102900882B
CN102900882B CN201210057167.2A CN201210057167A CN102900882B CN 102900882 B CN102900882 B CN 102900882B CN 201210057167 A CN201210057167 A CN 201210057167A CN 102900882 B CN102900882 B CN 102900882B
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CN
China
Prior art keywords
sleeve
unshakable
determination
minor diameter
axial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201210057167.2A
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Chinese (zh)
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CN102900882A (en
Inventor
野中智史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems Steering Ltd
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Filing date
Publication date
Application filed by Hitachi Automotive Systems Steering Ltd filed Critical Hitachi Automotive Systems Steering Ltd
Publication of CN102900882A publication Critical patent/CN102900882A/en
Application granted granted Critical
Publication of CN102900882B publication Critical patent/CN102900882B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
    • B62D5/083—Rotary valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/048—Electromagnetically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0668—Sliding valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/811—Actuator for control, e.g. pneumatic, hydraulic, electric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/598—With repair, tapping, assembly, or disassembly means
    • Y10T137/5987—Solenoid or electromagnetically operated valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Magnetically Actuated Valves (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The invention provides a solenoid valve, a solenoid and a variable volume pump which make the cascading precision stabilize when winding coils. The coils form a tublar shape in a manner of enabling an inner peripheral surface and an outer peripheral surface to be parallel with a shaft along the whole shaft direction. The sleeve comprises a sleeve large diameter portion and a sleeve small diameter portion, wherein the sleeve large diameter portion is disposed between an iron core small diameter portion of a front iron core and the coils and forms a tubular shape; and the sleeve small diameter portion is disposed between a rear ion core and an armature to form a tubular shape with a smaller diameter than that of the shape sleeve large diameter portion.

Description

Electromagnetic valve, solenoid and variable displacement pump
Technical field
The present invention relates to electromagnetic valve, solenoid and variable displacement pump.
Background technology
As this technology, the technology described in following patent documentations 1 is disclosed.Following technology is disclosed in the publication： Plunger is configured movably in plunger housing, plunger is in excited state, is inhaled under magnetic action by the energization to coil portion Hollow attractor side is guided to, thus the open and close valve amount of application valve body.
Patent documentation 1：(Japan) JP 2002-364533 publication
In the technology that above-mentioned patent documentation 1 is recorded, the magnetic conductive part in the magnetic field of coil portion generation is guided to be arranged at plunger The periphery of shell, hollow attractor are arranged at the inner circumferential side of plunger housing.Accordingly, it would be desirable to by arrange coil portion magnetic conductive part part Be formed as concavity, there is a problem of that in convolute coil stacking precision is unstable.
The content of the invention
The present invention is conceived to the problems referred to above and develops, and its object is to, there is provided stacking essence during a kind of convolute coil Spend stabilized electromagnetic valve, solenoid and variable displacement pump.
To achieve these goals, a kind of electromagnetic valve that first aspect present invention is provided, it is characterised in that have：
Solenoid shell, which is formed by magnetic material, and with cylindrical portion, axial side is blocked；
Coil, which is accommodated in the solenoid shell, so that inner peripheral surface and outer peripheral face are big with axial direction on whole axial direction Cause parallel mode to be formed as tubular, magnetic field is produced by being fed with electric current；
Front iron core, which is arranged at the axial opposite side of the cylindrical portion, is formed by magnetic material, including being configured at the line The minor diameter part unshakable in one's determination of the inner circumferential side of circle, the axial another side for being configured at the coil and with the continuous landform of the minor diameter part unshakable in one's determination Into large-diameter portion unshakable in one's determination, vertically by the bar through hole of the minor diameter part unshakable in one's determination and the large-diameter portion insertion unshakable in one's determination, be arranged at institute State an axially side end of minor diameter part unshakable in one's determination and the armature incorporating section with concave shape, be arranged at the periphery of the armature incorporating section The tapering that the annulus of side are formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side, and the front ferrum It is formed centrally the magnetic circuit in the magnetic field that the coil is produced；
Back core, which is arranged at the axial side of the cylindrical portion, is formed by magnetic material, is configured at the interior of the coil The week side of boss and compare it is described before the position near axial direction side unshakable in one's determination, be formed as tubular；
Bar, which is set to be axially moveable in the bar through hole；
Armature, which is arranged at the outer circumferential side of the bar, be set to inner circumferential side in the rear unshakable in one's determination and it is described before it is unshakable in one's determination Can together be axially moveable with the bar in armature incorporating section, with the cylindrical portion, the front unshakable in one's determination and described back core one With the magnetic circuit for forming the magnetic field that the coil is produced；
Sleeve, which is formed by nonmagnetic substance, including being arranged between the minor diameter part unshakable in one's determination and the coil and formed For the sleeve large-diameter portion of tubular, be arranged between the back core and the armature and tubular be formed as diameter than the sleeve The little sleeve minor diameter part of large-diameter portion, it is arranged between the sleeve large-diameter portion and the sleeve minor diameter part and by the sleeve big footpath The sleeve stage portion of the axial end side connection of an axially side end and the sleeve minor diameter part in portion；
Valve casing, which has guiding valve incorporating section and fluid path, and it is another that the guiding valve incorporating section is arranged at the front axial direction unshakable in one's determination Side and as the hole portion for axially extending, the fluid path is connecting to guiding valve incorporating section opening and with the bar through hole Logical mode is formed；
Guiding valve, which is arranged in the guiding valve incorporating section, is axially moveable the guiding valve by the bar, the guiding valve and institute State the flowing of the working solution that the fluid path of valve casing together controls to flow in the valve casing；
First seal member, which will be sealed between minor diameter part unshakable in one's determination and the sleeve large-diameter portion；
Second seal member, which will be sealed between back core and the sleeve minor diameter part；
Force application apparatus, which is to the armature from axially one lateral axial direction opposite side force.
The electromagnetic valve for providing according to a first aspect of the present invention, as sleeve is by sleeve large-diameter portion, sleeve minor diameter part and sleeve Stage portion is constituted, and unshakable in one's determination before the inner circumferential side configuration of sleeve large-diameter portion, in the outer circumferential side configuration back core of sleeve minor diameter part, Therefore, the inner and outer circumferential surfaces in coil are not provided with stage portion and can also constitute solenoid, easily carry out the manufacture of coil, and energy The miniaturization of solenoid is realized enough；And, it is by arranging tapering and armature incorporating section on front iron core, axially another when armature When one end is close to the front end in tapering, mainly magnetic field is formed between armature axial direction the other end and tapering, armature is axially another End is entered in armature incorporating section, thus in armature axial direction other end and front unshakable in one's determination relative with armature axial direction other end Magnetic field can be also formed between face, it is possible to increase the proportionality precision of solenoid.
The electromagnetic valve of second aspect present invention on the basis of the electromagnetic valve of first aspect present invention,
The outer circumferential side of described axial the other end of the back core has energy between the inner peripheral surface of the cylindrical portion The peristome of the coil is inserted enough,
Described axial the other end of back core inner circumferential side unshakable in one's determination in the rear has and is inserted into the sleeve The peristome of minor diameter part,
Described axial the other end of the sleeve has the opening for being inserted into the armature and the minor diameter part unshakable in one's determination Portion.
Electromagnetic valve according to a second aspect of the present invention, as by coil, armature, sleeve, front iron core can be from axially another Side is assembled, therefore, it is possible to improve assembleability.
The electromagnetic valve of third aspect present invention on the basis of the electromagnetic valve of second aspect present invention,
Second seal member is with the inner peripheral surface contiguity with the outer peripheral face and the back core of the sleeve minor diameter part Mode is configured between the sleeve minor diameter part and the back core.
Electromagnetic valve according to a third aspect of the present invention, due to the hydraulic pressure in the working solution from valve casing lateral sleeves internal leakage In the case of acting on sleeve minor diameter part, its hydraulic pressure is delivered to back core via the second seal member, therefore, it is possible to mitigate applying In the load of sleeve, the deformation of sleeve can be suppressed.
The electromagnetic valve of fourth aspect present invention on the basis of the electromagnetic valve of third aspect present invention,
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as external diameter than the sleeve The little sealing maintaining part of minor diameter part,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
Electromagnetic valve according to a fourth aspect of the present invention, by will sealing maintaining part to be formed as profile less than sleeve minor diameter part, Even if the second seal member is installed between sleeve minor diameter part and back core, it is also possible to make sleeve minor diameter part and back core enter one Step is close to, and can suppress the air gap (radial clearance) between back core and armature.
And, the second sealing can be assembled along a direction with being assembled in the state of sleeve.
The electromagnetic valve of fifth aspect present invention on the basis of the electromagnetic valve of first aspect present invention,
The solenoid shell has the axial side and the axial direction one with the sleeve for being arranged at the solenoid shell The relative face of side end is bottom surface,
The axial end side of the sleeve be configured to it is relative with an axially side end face of the large-diameter portion unshakable in one's determination,
The sleeve is formed as the axial length of the sleeve than the bottom surface and the axial direction of the large-diameter portion unshakable in one's determination Axial length between one side end face is short.
Electromagnetic valve according to a fifth aspect of the present invention, even if act on the stress for having hydraulic pressure to cause on front iron core, sleeve Before will not being also sandwiched between unshakable in one's determination and solenoid shell, therefore, it is possible to suppress the deformation of sleeve.
The electromagnetic valve of sixth aspect present invention on the basis of the electromagnetic valve of first aspect present invention,
The sleeve stage portion is formed as the radius of the sleeve stage portion from the lateral sleeve of the sleeve large-diameter portion The taper that minor diameter part side is gradually reduced,
The back core is formed as the internal diameter of the axial end side of the back core from axially another lateral axial direction one The taper that side is gradually reduced.
Electromagnetic valve according to a sixth aspect of the present invention, as back core can be configured to closer to front core side, therefore The lap increase of armature and back core, its result can be made to suppress the saturation in magnetic field.
The electromagnetic valve of seventh aspect present invention on the basis of the electromagnetic valve of first aspect present invention,
The back core is integrally formed with the solenoid hull shape.
Back core, as the means of fixed back core, is fixed on sleeve by electromagnetic valve according to a seventh aspect of the present invention In the case of, the sleeve of the back core and nonmagnetic substance of magnetic material necessarily split part, needs are welded to each other, but In the case that back core is arranged at solenoid shell, due to all being formed by magnetic material each other, therefore, it is possible to by back core with Solenoid hull shape is integrally formed.Accordingly, it is not necessary to miscellaneous operation as weld job.
The electromagnetic valve of eighth aspect present invention on the basis of the electromagnetic valve of first aspect present invention,
With the 3rd seal member and the 4th seal member, the 3rd seal member is arranged at institute with the state of compression State between one side end of axial direction of coil and the solenoid shell, the 4th seal member is arranged at the state of compression Between the axial end side of the coil and the large-diameter portion unshakable in one's determination,
3rd seal member is assembled with the compression ratio different from the compression ratio of the 4th seal member.
Electromagnetic valve according to a eighth aspect of the present invention, due to can by coil with to a direction it is pressured state assembling, because This is capable of rocking for suppression coil.
To achieve these goals, a kind of electromagnetic valve that ninth aspect present invention is provided, it is characterised in that have：
Solenoid shell, which is formed by magnetic material, and with cylindrical portion, axial side is blocked；
Coil, which is accommodated in the solenoid shell, so that inner peripheral surface and outer peripheral face are big with axial direction on whole axial direction Cause parallel mode to be formed as tubular, magnetic field is produced by being fed with electric current；
Front iron core, which is arranged at the axial opposite side of the cylindrical portion, is formed by magnetic material, including being configured at the line The minor diameter part unshakable in one's determination of the inner circumferential side of circle, the axial another side for being configured at the coil and with the continuous landform of the minor diameter part unshakable in one's determination Into large-diameter portion unshakable in one's determination, vertically by the bar through hole of the minor diameter part unshakable in one's determination and the large-diameter portion insertion unshakable in one's determination, be arranged at institute State an axially side end of minor diameter part unshakable in one's determination and the armature incorporating section with concave shape, be arranged at the periphery of the armature incorporating section The tapering that the annulus of side are formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side, and the front ferrum It is formed centrally the magnetic circuit in the magnetic field that the coil is produced；
Back core, which is arranged at the axial side of the cylindrical portion, is formed by magnetic material, is configured at the interior of the coil The week side of boss and compare it is described before the position near axial direction side unshakable in one's determination, be formed as tubular；
Bar, which is set to be axially moveable in the bar through hole；
Armature, which is arranged at the outer circumferential side of the bar, be set to inner circumferential side in the rear unshakable in one's determination and it is described before it is unshakable in one's determination Can together be axially moveable with the bar in armature incorporating section, with the cylindrical portion, the front unshakable in one's determination and described back core one With the magnetic circuit for forming the magnetic field that the coil is produced；
Sleeve, which is formed by nonmagnetic substance, including being arranged between the minor diameter part unshakable in one's determination and the coil and formed For the sleeve large-diameter portion of tubular, be arranged between the back core and the armature and tubular be formed as diameter than the sleeve The little sleeve minor diameter part of large-diameter portion, it is arranged between the sleeve large-diameter portion and the sleeve minor diameter part and by the sleeve big footpath The sleeve stage portion of the axial end side connection of an axially side end and the sleeve minor diameter part in portion；
Force application apparatus, which is to the armature from axially one lateral axial direction opposite side force.
The electromagnetic valve of tenth aspect present invention on the basis of the electromagnetic valve of ninth aspect present invention,
The outer circumferential side of axial the other end of the back core has between the inner peripheral surface of the cylindrical portion can be inserted Enter the peristome of the coil,
Axial the other end of back core inner circumferential side unshakable in one's determination in the rear has and is inserted into the sleeve path The peristome in portion,
Axial the other end of the sleeve has the peristome for being inserted into the armature and the minor diameter part unshakable in one's determination.
Electromagnetic valve according to a tenth aspect of the present invention, as by coil, armature, sleeve, front iron core can be from axially another Side is assembled, therefore, it is possible to improve assembleability.
The electromagnetic valve of tenth one side of the invention on the basis of the electromagnetic valve of tenth aspect present invention,
Second seal member is with the inner peripheral surface contiguity with the outer peripheral face and the back core of the sleeve minor diameter part Mode is configured between the sleeve minor diameter part and the back core.
According to the electromagnetic valve of the tenth one side of the invention, due to the liquid in the working solution from valve casing lateral sleeves internal leakage In the case that pressure acts on sleeve minor diameter part, its hydraulic pressure is delivered to back core via the second seal member, applies therefore, it is possible to mitigate The load of sleeve is added on, the deformation of sleeve can be suppressed.
The electromagnetic valve of the twelfth aspect of the present invention on the basis of the electromagnetic valve of tenth one side of the invention,
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as external diameter than the sleeve The little sealing maintaining part of minor diameter part,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
According to the electromagnetic valve of the twelfth aspect of the present invention, by sealing maintaining part is formed as profile than sleeve minor diameter part It is little, even if the second seal member is installed between sleeve minor diameter part and back core, it is also possible to make sleeve minor diameter part and back core It is closer, the air gap (radial clearance) between back core and armature can be suppressed.
And, the second sealing can be assembled along a direction with being assembled in the state of sleeve.
The present invention the 13rd in terms of electromagnetic valve on the basis of the electromagnetic valve of ninth aspect present invention,
The solenoid shell has the axial side and the axial direction one with the sleeve for being arranged at the solenoid shell The relative face of side end is bottom surface,
The axial end side of the sleeve be configured to it is relative with an axially side end face of the large-diameter portion unshakable in one's determination,
The sleeve is formed as the axial length of the sleeve than the bottom surface and the axial side of the large-diameter portion unshakable in one's determination Axial length between end face is short.
According to the electromagnetic valve in terms of the present invention the 13rd, even if effect has the stress of hydraulic pressure on front iron core, sleeve Before will not being sandwiched between unshakable in one's determination and solenoid shell, therefore, it is possible to suppress the deformation of sleeve.
The electromagnetic valve of fourteenth aspect of the present invention on the basis of the electromagnetic valve of ninth aspect present invention,
The sleeve stage portion is formed as the radius of the sleeve stage portion from the lateral sleeve of the sleeve large-diameter portion The taper that minor diameter part side is gradually reduced,
The back core is formed as the internal diameter of the axial end side of the back core from axially another lateral axial direction one The taper that side is gradually reduced.
According to the electromagnetic valve of fourteenth aspect of the present invention, as back core can be configured to closer to front core side, because This can make the lap increase of armature and back core, its result suppress the saturation in magnetic field.
The electromagnetic valve of the fifteenth aspect of the present invention on the basis of the electromagnetic valve of ninth aspect present invention,
The back core is integrally formed with the solenoid hull shape.
According to the electromagnetic valve of the fifteenth aspect of the present invention, due to the means as fixed back core, back core is fixed on In the case of sleeve, the sleeve of the back core and nonmagnetic substance of magnetic material necessarily split part, needs are mutually welded Connect, but in the case where back core to be arranged at solenoid shell, due to all being formed by magnetic material each other, therefore, it is possible to by after Iron core is integrally formed with solenoid hull shape.Accordingly, it is not necessary to miscellaneous operation as weld job.
The present invention the 16th in terms of electromagnetic valve on the basis of the electromagnetic valve of ninth aspect present invention,
With the 3rd seal member and the 4th seal member, the 3rd seal member is arranged at institute with the state of compression State between one side end of axial direction of coil and the solenoid shell, the 4th seal member is arranged at the state of compression Between the axial end side of the coil and the large-diameter portion unshakable in one's determination,
3rd seal member is assembled with the compression ratio different from the compression ratio of the 4th seal member.
According to the present invention the 16th in terms of electromagnetic valve, due to can by coil with to a direction it is pressured state assembling, Rock therefore, it is possible to suppression coil.
To achieve these goals, a kind of variable displacement pump for providing in terms of the present invention the 17th, which is by steering wheel Steering operation is delivered to deflecting roller, and the steering device for motor vehicle supply of power steering is produced to the hydraulic pressure by working solution Working solution, it is characterised in that have：
Pump case, which has pump part incorporating section；
Drive shaft, which is pivotally supported on the pump case；
The stator of ring-type, which can movably be arranged at the pump part incorporating section；
Pump part, which is arranged in the stator, the working solution row that the rotation driving by the drive shaft is sucked Go out, and as the stator makes the delivery flow of every revolution i.e. intrinsic relative to the change of the offset of the drive shaft Output, changes；
Solenoid, which is driven control according to the change of turn on angle, controls the offset of the stator；
The solenoid has：
Solenoid shell, which is formed by magnetic material, and with cylindrical portion, axial side is blocked；
Coil, which is accommodated in the solenoid shell, so that inner peripheral surface and outer peripheral face are big with axial direction on whole axial direction Cause parallel mode to be formed as tubular, magnetic field is produced by being fed with electric current；
Front iron core, which is arranged at the axial opposite side of the cylindrical portion, is formed by magnetic material, including being configured at the line The minor diameter part unshakable in one's determination of the inner circumferential side of circle, the axial another side for being configured at the coil and with the continuous landform of the minor diameter part unshakable in one's determination Into large-diameter portion unshakable in one's determination, vertically by the bar through hole of the minor diameter part unshakable in one's determination and the large-diameter portion insertion unshakable in one's determination, be arranged at institute State an axially side end of minor diameter part unshakable in one's determination and the armature incorporating section with concave shape, be arranged at the periphery of the armature incorporating section The tapering that the annulus of side are formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side, and the front ferrum It is formed centrally the magnetic circuit in the magnetic field that the coil is produced；
Back core, which is arranged at the axial side of the cylindrical portion, is formed by magnetic material, is configured at the interior of the coil The week side of boss and compare it is described before the position near axial direction side unshakable in one's determination, be formed as tubular；
Bar, which is set to be axially moveable in the bar through hole；
Armature, which is arranged at the outer circumferential side of the bar, be set to inner circumferential side in the rear unshakable in one's determination and it is described before it is unshakable in one's determination Can together be axially moveable with the bar in armature incorporating section, with the cylindrical portion, the front unshakable in one's determination and described back core one With the magnetic circuit for forming the magnetic field that the coil is produced；
Sleeve, which is formed by nonmagnetic substance, including being arranged between the minor diameter part unshakable in one's determination and the coil and formed For the sleeve large-diameter portion of tubular, be arranged between the back core and the armature and tubular be formed as diameter than the sleeve The little sleeve minor diameter part of large-diameter portion, it is arranged between the sleeve large-diameter portion and the sleeve minor diameter part and by the sleeve big footpath The sleeve stage portion of the axial end side connection of an axially side end and the sleeve minor diameter part in portion；
Valve casing, which has guiding valve incorporating section and fluid path, and it is another that the guiding valve incorporating section is arranged at the front axial direction unshakable in one's determination Side and as the hole portion for axially extending, the fluid path with to guiding valve incorporating section opening and with the bar through hole The mode of connection is formed；
Guiding valve, which is arranged in the guiding valve incorporating section, is axially moveable the guiding valve by the bar, the guiding valve and institute The flowing of the working solution that the fluid path of valve casing together controls to flow in the valve casing is stated, so as to control the bias of the stator Amount；
First seal member, which will be sealed between minor diameter part unshakable in one's determination and the sleeve large-diameter portion；
Second seal member, which will be sealed between back core and the sleeve minor diameter part；
Force application apparatus, which is to the armature from axially one lateral axial direction opposite side force.
The basis of variable displacement pump of the variable displacement pump in terms of the present invention the 18th in terms of the present invention the 17th On,
The outer circumferential side of the axial end side of the back core has between the inner peripheral surface of the cylindrical portion can The peristome of the coil is inserted,
The axial end side of back core inner circumferential side unshakable in one's determination in the rear is little with the sleeve is inserted into The peristome in footpath portion,
The axial end side of the sleeve has the peristome for being inserted into the armature and the minor diameter part unshakable in one's determination.
According to the variable displacement pump in terms of the present invention the 18th, as by coil, armature, sleeve, front iron core can Assembled from axial opposite side, therefore, it is possible to improve assembleability.
The basis of variable displacement pump of the variable displacement pump in terms of the present invention the 19th in terms of the present invention the 18th On,
Second seal member is with the inner peripheral surface contiguity with the outer peripheral face and the back core of the sleeve minor diameter part Mode is configured between the sleeve minor diameter part and the back core.
According to the variable displacement pump in terms of the present invention the 19th, due in the work from valve casing lateral sleeves internal leakage In the case of sleeve minor diameter part, its hydraulic pressure is delivered to back core via the second seal member to the hydraulic action of liquid, therefore, it is possible to Mitigation puts on the load of sleeve, can suppress the deformation of sleeve.
The basis of variable displacement pump of the variable displacement pump in terms of the present invention the 20th in terms of the present invention the 19th On,
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as external diameter than the sleeve The little sealing maintaining part of minor diameter part,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
It is according to the variable displacement pump in terms of the present invention the 20th, less than sleeve by sealing maintaining part is formed as profile Footpath portion is little, even if the second seal member is installed between sleeve minor diameter part and back core, it is also possible to make sleeve minor diameter part and after It is unshakable in one's determination closer, the air gap (radial clearance) between back core and armature can be suppressed.
And, the second sealing can be assembled along a direction with being assembled in the state of sleeve.
In accordance with the invention it is possible to stacking stable accuracy when making convolute coil.
Description of the drawings
Fig. 1 is the steering device for motor vehicle of the electromagnetic valve, solenoid and the variable displacement pump that employ first embodiment Overall system view；
Fig. 2 is the profile of the electromagnetic valve of first embodiment；
Description of reference numerals
1 solenoid shell
1a cylindrical portions
1b bottom surfaces
2 coils
It is unshakable in one's determination before 3
3a iron core minor diameter parts
3b iron core large-diameter portions
3c bar through holes
3d fluid paths
3e armatures incorporating section
3f taperings
4 back cores
4a peristomes
4b peristomes
5 bars
6 armatures
7 sleeves
7a sleeve large-diameter portions
7b sleeve minor diameter parts
7c sleeve stage portions
7d seals maintaining part
7e peristomes
8 valve casings
8a guiding valves incorporating section
8b fluid paths
9 guiding valves
10 seal members (the first seal member)
11 seal members (the second seal member)
12 springs (force application part)
13 seal members (the 3rd seal member)
14 seal members (the 4th seal member)
30 steering wheels
37 booster cylinders (steering device for motor vehicle)
41 deflecting rollers
44 oil pumps (oil pump)
45 rotors (pump part)
46 blades (pump part)
47 stators (pump part)
48 pump part incorporating sections
49 pump cases
50 drive shafts
51 electromagnetic valves
53 solenoids
Specific embodiment
(first embodiment)
[being monolithically fabricated]
Fig. 1 is the steering device for motor vehicle of the electromagnetic valve, solenoid and the variable displacement pump that employ first embodiment Overall system view.Steering spindle 31 is connected with the steering wheel 30 of operator.Via universal joint 32 in steering spindle 31 Upside jackshaft 33 is connected with, and downside jackshaft 35 is connected with via universal joint 34 on upside jackshaft 33.Under Pinion shaft 36 is connected with side jackshaft 35.On pinion shaft 36 via the hydraulic control for carrying out booster cylinder 37 liquid Pressure control valve 38 is connected with little gear (not shown).Hydraulic control valve 38 carries out relative movement according to the steering torque of driver, Thus hydraulic pressure supply road and hydraulic pressure supply amount are suitably switched.
Little gear is engaged with rack shaft 39, and little gear is rotated according to the steering angle of driver, and rack shaft 39 is according to the rotation Corner (steering angle) and move left and right.Rack shaft 39 is by having piston and making rack shaft 39 to the left in booster cylinder 37 Supply in hydraulic pressure, and booster cylinder room when moving to the right to the left in booster cylinder room when mobile to the right and supply Hydraulic pressure, carrys out assisted diversion torque.The two ends of rack shaft 39 are connected with deflecting roller 41 via track rod 40, according to driver's Operation is turned to.
In addition, oil pump 44 is equiped with the electromotor 42 of vehicle, the oil pump 44 is driven via belt 43 by bent axle. The oil pump 44 is variable displacement vane pump, is had：With electromotor rotation synchronous rotary rotor 45, in the periphery of rotor 45 Radially haunt configure freely tabular blade 46, eccentric in prescribed limit determine relative to the center of rotation of rotor 45 Son 47, and there is the pump case 49 of the pump part incorporating section 48 for receiving these rotors 45, blade 46 and stator 47 (pump part).Pump The drive shaft 50 of 49 pairs of driving rotors 45 of shell carries out e axle supporting.It is electricity that pump case 49 has the proportioning valve of the offset of control stator 47 Magnet valve 51.
Metering orifice (not shown) is provided with the discharge oil circuit 52 of oil pump 44, the mouth aperture of the metering orifice is configured to can be by electricity Magnetic coil 53 carries out variable control.Control valve 54 has control room and discharge pressure room, wherein, control room is located at control valve 54 Left location in Fig. 1, carries out hydraulic pressure supply to the gap being formed between 49 inner circumferential of 47 periphery of stator and pump case；Discharge pressure room Positioned at right position in Fig. 1 of control valve 54, discharge pressure is fed with.Control room and the upstream side communication of metering orifice, discharge pressure Power room is connected with the downstream (55 side of high pressure oil supply road) of metering orifice.Stator 47 is pressured to inclined by spring 56 in an initial condition The maximum position of heart amount, changes according to rotating speed and is imported into the indoor pressure of control, control the offset of stator 47.When to flow measurement When the mouth aperture of mouth is controlled, the delivery flow characteristic (variation characteristic of offset) relative to revolution speed can be changed, together When can also change for driving the torque required for oil pump 44.
Oil pump 44 has：The oil supply road 57 of the working solution in suction fluid reservoir 56, by the high pressure discharge pressure of oil pump 44 It is supplied to the high pressure oil supply road 55 of hydraulic control valve 38, makes from hydraulic control valve 38 working oil discharged return to fluid reservoir 56 Oil return road 58.If the relative movement that torque is adapted is carried out and turned in hydraulic control valve 38, appropriate switching with The high pressure oil supply road 55 of the assisted hydraulic cylinder chamber connection of left and right and oil return to road 58.
Information, the detection car speed of the steering angle sensor 61 of the steering angle of detection driver are input into control unit 60 Vehicle speed sensor 62 information, control electromotor 42 control unit of engine 63 information.From control unit of engine 63 It is input into for judging whether that bent axle is activated the information of motor rotation, engine speed information etc..Control unit 60 is via point Fire switch 65 is connected with accumulator 64, when ignition switch 65 is connected, is started control unit 60 and is initially powered up, perform the control of regulation System.It should be noted that in the case of common engine vehicle, lighted a fire by the key operated of driver, Ran Houjin One step rotates key or presses start button, and the bent axle rotation started with electromotor is performed within the time of regulation.
Control unit 60 according to the steering angle being input into from steering angle sensor 61, from vehicle speed sensor 62 input speed, From the engine speed of the input of control unit of engine 63, electromagnetic valve driving current (target current command value) is obtained, according to mesh Mark current instruction value control is supplied to the electric current of electromagnetic valve 51.
[composition of electromagnetic valve]
Fig. 2 is the profile of electromagnetic valve 51.It is figure when coil 2 is not powered on the left of Fig. 2, when right side is that coil 2 is powered Figure.Electromagnetic valve 51 has：Solenoid shell 1, the coil 2 being accommodated in the solenoid shell 1, the magnetic for forming the generation of coil 2 Magnetic circuit front unshakable in one's determination 3, be arranged at before comparing unshakable in one's determination 3 near axial direction side back core 4, form the magnetic field that coil 2 is produced Magnetic circuit armature 6, and the armature 6 bar 5 for integratedly moving, the sleeve 7 formed by nonmagnetic substance, form fluid path 8b Valve casing 8, the guiding valve 9 is controlled by the flowing of the working solution in valve casing 8.
(solenoid shell)
Solenoid shell 1 is with being formed by magnetic material and with hollow cylindrical portion 1a.Axle inside cylindrical portion 1a To side bottom convex be formed with central part, the face forms bottom surface 1b.In bottom surface, 1b is formed with the regulation to outside insertion Screw penetration hole 1c.Female thread is partially formed with adjusting screw through hole 1c.It is embedded in adjusting screw through hole 1c Conjunction has adjusting screw 16, and the adjusting screw 16 is formed with external screw thread.In the adjusting screw through hole of be fitted together to adjusting screw 16 The outside opening side of 1c is formed with sealing maintaining part 16a.Seal member 17 is provided with sealing maintaining part 16a.
In the inner circumferential of solenoid shell 1, coil incorporating section 1d is formed with axial side, and is formed with axial opposite side Diameter is formed as the front unshakable in one's determination incorporating section 1e bigger than the inner circumferential footpath of coil incorporating section 1d.
In addition, the axial opposite side in cylindrical portion 1a is formed with the flange part 1f that radially extends, in flange part 1f shapes Into having multiple through hole 1g of flange part 1f insertions.Electromagnetic valve 51 is fixed on into pump in through hole 1g insertion bolts etc. On shell 49.
(back core)
Back core 4 is formed by magnetic material, and is formed as one with solenoid shell 1.Back core 4 is from solenoid shell 1 Bottom surface 1b to axial opposite side extend be formed as hollow tubular.That is, in the outer peripheral face and solenoid shell 1 of back core 4 Space is formed between inner peripheral surface, the axial end side in the space forms peristome 4a.And, in the inner peripheral surface of back core Space is also formed with, the axial end side in the space forms peristome 4b.Peristome 4b (the axial opposite sides of back core 4 End) internal diameter be formed as from the taper that axially another lateral axial side is gradually reduced.
(coil)
Coil 2 is accommodated in the inner circumferential side of solenoid shell 1.That is, 2 insertion opening portion 4a of coil.The outward appearance of coil 2 is used as whole Body is barrel shape, inner peripheral surface and outer peripheral face be formed as on whole axial direction with it is approximately axially parallel.Coil 2 is by being fed with electric current And produce magnetic field.Sealing maintaining part 2a in the corner for cutting away inner circumferential is formed with one side end of axial direction of coil 2.Protect in the sealing Hold, state of the seal member 13 in compression.
(sleeve)
Sleeve 7 is formed by nonmagnetic substance, and which is formed from the sleeve large-diameter portion 7a of the tubular of axial opposite side, is formed at Axial side and diameter sleeve minor diameter part 7b, the branch sleeve large-diameter portion 7a less than sleeve large-diameter portion 7a and sleeve minor diameter part 7b's Sleeve stage portion 7c is constituted.
Diameter sealing maintaining part 7d less than sleeve minor diameter part 7b is formed with one side end of axial direction of sleeve minor diameter part 7b, And it is provided with seal member 11.Sleeve minor diameter part 7b inserts back core with the state that seal member 11 is provided with sealing maintaining part 7d 4 peristome 4b.State of the periphery of the sleeve minor diameter part 7b of insertion back core 4 in the inner circumferential contiguity with back core 4.
The inner circumferential contiguity of periphery and back core 4 of the seal member 11 with sealing maintaining part 7d, it is ensured that sealing.
When sleeve minor diameter part 7b inserts back core 4, an axially side end (axial direction one of sleeve 7 of sleeve minor diameter part 7b Side end) it is opposite with the bottom surface 1b of solenoid shell 1.
It is little that sleeve stage portion 7c is formed as its radius sleeve less than sleeve large-diameter portion 7a from sleeve large-diameter portion 7a to diameter The taper that footpath portion 7b is gradually reduced.
The axial side of sleeve large-diameter portion 7a and sleeve stage portion 7c insertion back core 4 is the inner circumferential of coil 2.Sleeve step The external diameter of portion 7c peripheries is formed in the way of gradually increasing from axially one lateral axial direction opposite side.
Peristome 7e is formed with the axial end side of sleeve 7.
(bar, armature)
Bar 5 is formed as cylindric by nonmagnetic substance.Armature 6 is formed by magnetic material, is fixed on the axial side of bar 5. Armature 6 is accommodated in sleeve minor diameter part 7b from the peristome 7e insertions of sleeve 7.Accompany by non-magnetic between armature 6 and back core 4 Property material formed sleeve 7, axial movement of the sleeve 7 to armature 6 is oriented to, and prevents armature 6 because magnetic is pasted on Back core 4.
Spring 12 is provided between one side end of axial direction and adjusting screw 16 of bar 5, bar 5 is exerted a force to axial opposite side.
(front iron core)
The front unshakable in one's determination 3 axial opposite sides for being arranged at back core 4.Conversely, unshakable in one's determination 3 axial direction one before back core 4 is arranged at Side.Front iron core is formed by magnetic material, is formed with the magnetic circuit in the magnetic field of the generation of coil 2.Front unshakable in one's determination 3 by minor diameter part 3a unshakable in one's determination and ferrum Heart large-diameter portion 3b is constituted, wherein, minor diameter part 3a unshakable in one's determination is configured at the inner circumferential side of coil 2, and large-diameter portion 3b unshakable in one's determination is configured at coil 2 Axial another side and it is formed continuously with minor diameter part 3a unshakable in one's determination.
In the armature incorporating section 3e that one side end of axial direction of minor diameter part 3a unshakable in one's determination is formed with being formed with concave shape.Armature is received The external diameter of portion 3e peripheries is formed with tapering 3f, tapering 3f shapes in the way of gradually increasing from axially one lateral axial direction opposite side Into.
Minor diameter part 3a unshakable in one's determination is accommodated in the inner circumferential side of sleeve minor diameter part 7b from the peristome 7e insertions of sleeve 7, and armature is received The portion 3e of receiving is accommodated in sleeve stage portion 7c of sleeve 7.Minor diameter part 3a unshakable in one's determination periphery channel-shaped formed sealing maintaining part 3g, is provided with seal member 10 in sealing maintaining part 3g.Sealing maintaining part 3g periphery and sleeve 7 sleeve large-diameter portion 7a it Between be tightly locked with seal member 10, it is ensured that sealing.
Large-diameter portion 3b unshakable in one's determination is accommodated in the incorporating section 1e front unshakable in one's determination of solenoid shell 1.Now, the axial direction of large-diameter portion 3b unshakable in one's determination One side end face is relative with the axial end side of sleeve large-diameter portion 7a (the axial end side of sleeve 7).Need explanation It is that the axial length of sleeve 7 is formed as between one side end face of axial direction than the bottom surface 1b and large-diameter portion 3b unshakable in one's determination of solenoid shell 1 Axial length it is short.And, seal member 14, institute are provided between large-diameter portion 3b unshakable in one's determination and the axial end side of coil 2 State state of the seal member 14 in compression.It is different that the seal member 14 is set to compression ratio opposing seal part 13, institute State the axially side end that seal member 13 is arranged at coil 2.
Front unshakable in one's determination 3 are formed with the minor diameter part 3a unshakable in one's determination and bar through hole 3c of large-diameter portion 3b insertions unshakable in one's determination vertically.At this The block 15 of the cylindrical shape formed by nonmagnetic substance is bonded in bar through hole 3c.The sleeve minor diameter part 7b's by sleeve 7 Armature 6 is accommodated with the space that inner circumferential and armature incorporating section 3e are formed, and the axial side of bar 5 is inserted with the inner circumferential of block 15.Electricity Pivot 6 and bar 5 are together slided in the space that the inner circumferential and armature incorporating section 3e of the sleeve minor diameter part 7b by sleeve 7 are formed vertically It is dynamic.Block 15 is abutted with one side end face of axial direction of armature 6, prevents armature 6 because of magnetic when armature 6 is moved to most by axial side Property and unshakable in one's determination 3 before being pasted on.
Connect with bar through hole 3c and be formed with fluid path 3d.It is more another to axial direction that fluid path 3d is formed as diameter Side is bigger.And, connect with the axial opposite side of fluid path 3d and be formed with valve casing incorporating section 3h.The valve casing incorporating section 3h shapes Become diameter bigger than fluid path 3d.
(guiding valve)
The external diameter of guiding valve 9 is formed with cylindrical portion 9a for being formed cylindricly, the axially side end for being formed at cylindrical portion 9a And the diameter large-diameter portion 9b bigger than cylindrical portion 9a.Large-diameter portion 9b is with diameter from the side that axially a side end gradually increases to opposite side Formula is formed.Stage portion 9c for radially extending is formed between large-diameter portion 9b and cylindrical portion 9a.
In the inside of guiding valve 9, hollow fluid path 9d is formed with from axial end side to the midway of side.Formed There are multiple throttle orifice 9e from fluid path 9d insertions on the outside of the side of footpath.
(valve casing)
The outward appearance of valve casing 8 is integrally formed as cylindrical shape, unshakable in one's determination 3 valve casing incorporating section 3h before axial opposite side insertion. Sealing maintaining part 8e is formed with the axial end side of valve casing 8, seal member 18 is provided with sealing maintaining part 8e.At this The inner circumferential of the periphery of sealing maintaining part 8e and front unshakable in one's determination 3 valve casing incorporating section 3h is tightly locked with seal member 18, it is ensured that sealing.
The through hole of insertion vertically is formed with valve casing 8, its axial opposite side constitutes guiding valve incorporating section 8a, axial direction one Side constitutes fluid path 8b.And, stage portion is formed between guiding valve incorporating section 8a and fluid path 8b, the stage portion is constituted Spring seat portions 8h.The diameter that is partially formed with guiding valve incorporating section 8a and in fluid path 8b is formed as bigger than fluid path 8b Endless groove 8c.And, connect with endless groove 8c and be formed with the tap 8d of radially insertion.
In 8 periphery of valve casing, clip tap 8d and be formed with sealing maintaining part 8f, 8g.In sealing maintaining part 8f, 8g point Seal member 19,20 is not provided with.
In guiding valve incorporating section, 8a is axially slidably inserted with cylindrical portion 9a of guiding valve 9.And, in spring seat portions 8h and cunning Spring 21 is provided between stage portion 9c of valve 9, guiding valve 9 is exerted a force to axial side.Thus, the axially side end of guiding valve 9 Face is abutted with the axial end side of bar 5, and bar 5 and armature 6 all slide axially.
[acting on]
(action of electromagnetic valve)
Coil 2 one is powered, and will produce by solenoid shell 1, back core 4, armature 6, front unshakable in one's determination 3 magnetic field.Now, The captivation of radial direction is acted between back core 4 and armature 6, and the captivation of axial direction is acted between front unshakable in one's determination 3 and armature 6, because This armature 6 is attracted to axial side.
Thus, opening to the effluent hole 9e between the endless groove 8c and tap 8d of the fluid path 9d and valve casing 8 of guiding valve 9 Degree carries out variable control.
(facilitation of coil manufacture)
In order to prevent armature 6 to be pasted on back core 4 because of magnetic, need sleeve 7 is arranged between armature 6 and back core 4. That is, back core 4 is located at the outer circumferential side of sleeve 7.On the other hand, in order that the captivation of axial direction before acting on unshakable in one's determination 3 and armature 6 it Between, need the axial side for armature 6 being arranged on by front unshakable in one's determination 3.In order to prevent the iron core 3 before magnetic is pasted on of armature 6, it is also possible to Sleeve 7 is arranged between armature 6 and front unshakable in one's determination 3, but the shape of sleeve 7 can become complicated, therefore made in the first embodiment With block 15.That is, front unshakable in one's determination 3 inner circumferential sides for being located at sleeve 7.
Stage portion can also be formed in the inner circumferential of coil 2 and configure back core 4, but if the inner circumferential in coil 2 is arranged In convolute coil 2, stage portion, then have that stacking precision is unstable.
Therefore, in the first embodiment, sleeve is constituted by sleeve large-diameter portion 7a, sleeve minor diameter part 7b and sleeve stage portion 7c 7, unshakable in one's determination 3 before the inner circumferential side of sleeve large-diameter portion 7a is configured with, back core 4 is configured with the outer circumferential side of sleeve minor diameter part 7b.
Thus, the inner peripheral surface in coil 2 is not provided with stage portion, can be by coil 2 so that inner peripheral surface and outer peripheral face are whole Be formed as tubular with approximately axially parallel mode on axial direction.Therefore, the winding of coil 2 is easily carried out, stacking precision can be made Stablize, and easily carry out the manufacture of coil, can be by 2 miniaturization of coil.
(raising of the proportionality precision of solenoid)
In the first embodiment, it is provided with armature incorporating section 3e on front unshakable in one's determination 3 and is arranged at armature incorporating section 3e's The tapering 3f that the annulus of outer circumferential side are formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side.
Before one side end of axial direction of armature 6 is moved to during the position of unshakable in one's determination 3 armature incorporating section 3e, in front 3 He unshakable in one's determination Between armature 6, in addition to the captivation of axial direction, also radially acting captivation.As the periphery of armature incorporating section 3e is formed with The tapering 3f formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side, therefore, as armature 6 is to axial direction one Side shifting, the captivation for acting on radial direction are increasing relative to the ratio for acting on axial captivation.Therefore, even if armature 6 and front unshakable in one's determination 3 are close to, it is also possible to reduce the increase of the captivation of axial direction, it is possible to increase proportioning valve is that the ratio of electromagnetic valve 51 is special Property precision.
(raising of the assembleability of coil etc.)
In the first embodiment, the outer circumferential side of the axial end side of back core 4 the inner peripheral surface with cylindrical portion 1a it Between be formed with the peristome 4a that coil 2 can be inserted, the axial end side of back core 4 is formed in the inner circumferential side of back core 4 There is the peristome 4b that sleeve minor diameter part 7b can be inserted, the axial end side of sleeve 7 is formed with can be by armature 6 and front iron core The peristome 7e of 3 minor diameter part 3a insertions unshakable in one's determination.
Thus, coil 2, armature 6, sleeve 7, front unshakable in one's determination 3 can be assembled from axial opposite side, therefore, it is possible to improve group Dress property.
(suppression of the radial deformation of sleeve)
In the first embodiment, seal member 11 is with close with the inner peripheral surface of the outer peripheral face and back core 4 of sleeve minor diameter part 7b The mode for connecing is configured between sleeve minor diameter part 7b and back core 4.
Thus, the working solution from 8 lateral sleeves of valve casing, 7 internal leakage hydraulic action in the situation of sleeve minor diameter part 7b Under, its hydraulic pressure is delivered to back core 4 via seal member 11, therefore, it is possible to mitigate the load for putting on sleeve 7, can suppress set The deformation of cylinder 7.
(suppression of the air gap of back core and sleeve)
In the first embodiment, there is sleeve 7 one side end of axial direction and external diameter that are arranged at sleeve minor diameter part 7b to be formed as Sealing maintaining part 7d less than sleeve minor diameter part 7b, is provided with sealing in the way of touching in the outer peripheral face of sealing maintaining part 7d Part 11.
Thus, even if seal member 11 is installed between sleeve minor diameter part 7b and back core 4, it is also possible to make sleeve minor diameter part 7b and back core 4 are close to.Therefore, it is possible to suppress the gas between the armature 6 and back core 4 of the inner circumferential for being accommodated in sleeve minor diameter part 7b Gap (radial clearance), can suppress from back core 4 to the magnetic force of armature 6 to reduce.
(raising of the assembleability of sleeve)
In the first embodiment, there is sleeve 7 one side end of axial direction and external diameter that are arranged at sleeve minor diameter part 7b to be formed as Sealing maintaining part 7d less than sleeve minor diameter part 7b, is provided with sealing in the way of touching in the outer peripheral face of sealing maintaining part 7d Part 11.
Thus, in the state of sealing maintaining part 7d over-assemble has seal member 11, sleeve 7 can be assembled in back core 4, it is possible to increase the assembleability of sleeve 7.
(suppression of the axial deformation of sleeve)
The axial length of sleeve 7 is formed as into the bottom surface 1b's and front by unshakable in one's determination 3 large-diameter portion 3b unshakable in one's determination than solenoid shell 1 Axial length axially between a side end face is short.
Thus, even if act on the stress for having hydraulic pressure to cause on front unshakable in one's determination 3, it is also possible to prevent sleeve 7 to be sandwiched in front ferrum The deformation of sleeve 7 between the heart 3 and solenoid shell 1, can be suppressed.
(suppression of magnetic field saturation)
In the first embodiment, sleeve stage portion 7c is formed as into radius from sleeve large-diameter portion 7a lateral sleeves minor diameter part 7b The taper that side is gradually reduced, the internal diameter of the axial end side of back core 4 is formed as from axially another lateral axial side The taper being gradually reduced.
Thereby, it is possible to deeper inside configuration sleeve stage portion 7c to back core 4, it is also possible to before being accommodated in sleeve 7 Unshakable in one's determination 3 are configured at more posteriorly 4 side unshakable in one's determination.Thus, it is possible to increase back core 4 and front unshakable in one's determination 3 lap, magnetic field can be suppressed Saturation.
(facilitation that back core is formed)
In the first embodiment, back core 4 is formed as one with solenoid shell 1.
Back core 4 also can be formed as one with sleeve 7, but ought will make the back core 4 formed by magnetic material and by non- When the sleeve 7 that magnetic material is formed forms as one, need to weld back core 4 and sleeve 7.On the other hand, will be by magnetic Property the back core 4 that formed of material and in the case that solenoid shell 1 forms as one, can share to form back core 4 and electromagnetism The mould of coil housing 1, can save miscellaneous operations such as welding.
(suppression that coil is rocked)
In the first embodiment, relative between an axially side end and solenoid shell 1 of coil 2 with compression The seal member 13 that arranges of state, the axial end side and front unshakable in one's determination 3 in coil 2 is assembled with different compression ratios The seal member 14 arranged with the state of compression between large-diameter portion 3b unshakable in one's determination.
Thus, coil 2 to be to be assembled to a direction by pressured state, therefore, it is possible to rocking for suppression coil 2.
[effect]
The effect of first embodiment is as described below.
(1) it is provided with：Solenoid shell 1, which is formed by magnetic material, and with cylindrical portion 1a, axial side is blocked；Coil 2, which is accommodated in solenoid shell 1, to make the inner peripheral surface and outer peripheral face shape in the way of approximately axially parallel on whole axial direction Become tubular, magnetic field is produced by being fed with electric current；Front unshakable in one's determination 3, which is arranged at the axial opposite side of cylindrical portion 1a, by magnetic Material is formed, minor diameter part 3a unshakable in one's determination including the inner circumferential side for being configured at coil 2, be configured at coil 2 axial another side and with Large-diameter portion 3b unshakable in one's determination that minor diameter part 3a unshakable in one's determination is continuously formed, vertically by minor diameter part 3a unshakable in one's determination and large-diameter portion 3b insertions unshakable in one's determination Bar through hole 3c, the axially side end and the armature incorporating section 3e with concave shape that are arranged at minor diameter part 3a unshakable in one's determination, it is arranged at The annulus of the outer circumferential side of armature incorporating section 3e are formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side Tapering 3f, and formed coil 2 produce magnetic field magnetic circuit；Back core 4, which is arranged at the axial side of cylindrical portion 1a, by magnetic Property material formed, be configured at the inner circumferential side of coil 2 and before comparing unshakable in one's determination 3 near the position of axial direction side, be formed as tubular；Bar 5, Which is set to can axially move in bar through hole 3c；Armature 6, which is arranged at the outer circumferential side of bar 5, is set in back core 4 Inner circumferential side and front unshakable in one's determination 3 armature incorporating section 3e in together can axially move with bar 5, with cylindrical portion 1a, front unshakable in one's determination 3 and after Unshakable in one's determination 4 magnetic circuits for together forming the magnetic field that coil 2 is produced；Sleeve 7, which is formed by nonmagnetic substance, unshakable in one's determination little including being arranged at Between footpath portion 3a and coil 2 and be formed as the sleeve large-diameter portion 7a of tubular, be arranged between back core 4 and armature 6 and tubular ground Be formed as the diameter sleeve minor diameter part 7b less than sleeve large-diameter portion 7a, be arranged between sleeve large-diameter portion 7a and sleeve minor diameter part 7b And the sleeve stage portion that the axial end side of an axially side end and sleeve minor diameter part 7b of sleeve large-diameter portion 7a is connected 7c；Valve casing 8, its have be arranged at before unshakable in one's determination 3 axial opposite side and axially extend hole portion i.e. guiding valve incorporating section 8a, with to The fluid path 8b that the mode that guiding valve incorporating section 8a is open and is connected with bar through hole 3c is formed；Guiding valve 9, which is arranged at guiding valve In the 8a of incorporating section, it is axially moveable which by bar 5, with the fluid path 8b of valve casing 8 together to the work in 8 interior flowing of valve casing The flowing of liquid is controlled；Seal member 10 (the first seal member), which is by between minor diameter part 3a unshakable in one's determination and sleeve large-diameter portion 7a Sealing；Seal member 11 (the second seal member), which will be sealed between back core 4 and sleeve minor diameter part 7b；12 (force dress of spring Put), which is to armature 6 from axially one lateral axial direction opposite side force.
Thus, stage portion is not provided with the inner peripheral surface of coil 2, can be by coil 2 so that inner peripheral surface and outer peripheral face are whole Be formed as tubular with approximately axially parallel mode on axial direction.Therefore, the winding of coil 2 is easily carried out, stacking precision can be made It is stable, the manufacture of coil is easily carried out, can be by 2 miniaturization of coil.
Even if in addition, armature 6 and front unshakable in one's determination 3 is close to, it is also possible to reduce the increase of the captivation of axial direction, it is also possible to improve ratio Example valve is the proportionality precision of electromagnetic valve 51.
(2) outer circumferential side of the axial end side of back core 4 has between the inner peripheral surface of cylindrical portion 1a and can be inserted into The peristome 4a of coil 2, the axial end side of back core 4 have pluggable sleeve minor diameter part in the inner circumferential side of back core 4 The peristome 4b of 7b, the axial end side of sleeve 7 have the peristome 7e that can be inserted into armature 6 and minor diameter part 3a unshakable in one's determination.
Thus, coil 2, armature 6, sleeve 7, front unshakable in one's determination 3 can be assembled from axial opposite side, therefore, it is possible to carry High assembleability.
(3) seal member 11 is configured in the way of the inner peripheral surface with the outer peripheral face and back core 4 of sleeve minor diameter part 7b touches Between sleeve minor diameter part 7b and back core 4.
Thus, the working solution from 8 lateral sleeves of valve casing, 7 internal leakage hydraulic action in the situation of sleeve minor diameter part 7b Under, its hydraulic pressure is delivered to back core 4 via seal member 11, therefore, it is possible to mitigate the load for putting on sleeve 7, can suppress set The deformation of cylinder 7.
(4) there is sleeve 7 one side end of axial direction and external diameter that are arranged at sleeve minor diameter part 7b to be formed as than sleeve minor diameter part 7b little sealing maintaining part 7d, seal member 11 are configured to the outer peripheral face contiguity with sealing maintaining part 7d.
Thus, even if seal member 11 is installed between sleeve minor diameter part 7b and back core 4, it is also possible to make sleeve path Portion 7b and back core 4 are close to.Therefore, it is possible to suppress between the armature 6 and back core 4 of the inner circumferential for being accommodated in sleeve minor diameter part 7b Air gap (radial clearance), can suppress from back core 4 to the magnetic force of armature 6 to reduce.
(5) solenoid shell 1 has the axial side and the axially side end with sleeve 7 for being arranged at solenoid shell 1 Relative face is bottom surface 1b, the axial end side of sleeve 7 be configured to it is relative with an axially side end face of large-diameter portion 3b unshakable in one's determination, Sleeve 7 is formed as the axial length of sleeve 7 than bottom surface 1b and the axial length axially between a side end face of large-diameter portion 3b unshakable in one's determination It is short.
Thus, even if act on the stress for having hydraulic pressure to cause on front unshakable in one's determination 3, it is also possible to prevent sleeve 7 to be sandwiched in front ferrum The deformation of sleeve 7 between the heart 3 and solenoid shell 1, can be suppressed.
(6) sleeve stage portion 7c is formed as the radius for making sleeve stage portion 7c from sleeve large-diameter portion 7a lateral sleeves minor diameter parts The taper that 7b sides are gradually reduced, the internal diameter that back core 4 is formed as the axial end side for making back core 4 are another lateral from axial direction The taper that axial side is gradually reduced.
Thus, it is possible to deeper inside configuration sleeve stage portion 7c of back core 4, can compare before being accommodated in sleeve 7 Unshakable in one's determination 3 are configured near the position of 4 side of back core.Thus, it is possible to increase back core 4 and front unshakable in one's determination 3 lap, can press down The saturation in magnetic field processed.
(7) back core 4 is formed as one with solenoid shell 1.
Thus, miscellaneous operations such as welding can be saved.
(8) the axially close between a side end and solenoid shell 1 of coil 2 is arranged at with the state of compression Envelope part 13 (the 3rd seal member), the axial end side that coil 2 is arranged at the state of compression and big footpath unshakable in one's determination Seal member 14 (the 4th seal member) between portion 3b, seal member 13 is with the compression different from the compression ratio of seal member 14 Rate is assembled.
Thus, coil 2 to be assembled to a direction by pressured state, therefore, it is possible to rocking for suppression coil 2.
(9) it is provided with：Solenoid shell 1, which is formed by magnetic material, and with cylindrical portion 1a, axial side is blocked；Coil 2, which is accommodated in solenoid shell 1, to make the inner peripheral surface and outer peripheral face shape in the way of approximately axially parallel on whole axial direction Become tubular, magnetic field is produced by being fed with electric current；Front unshakable in one's determination 3, which is arranged at the axial opposite side of cylindrical portion 1a, by magnetic Material is formed, minor diameter part 3a unshakable in one's determination including the inner circumferential side for being configured at coil 2, be configured at coil 2 axial another side and with Large-diameter portion 3b unshakable in one's determination that minor diameter part 3a unshakable in one's determination is continuously formed, vertically by minor diameter part 3a unshakable in one's determination and large-diameter portion 3b insertions unshakable in one's determination Bar through hole 3c, the axially side end and the armature incorporating section 3e with concave shape that are arranged at minor diameter part 3a unshakable in one's determination, it is arranged at The annulus of the outer circumferential side of armature incorporating section 3e are formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side Tapering 3f, and formed coil 2 produce magnetic field magnetic circuit；Back core 4, which is arranged at the axial side of cylindrical portion 1a, by magnetic Property material formed, be configured at the inner circumferential side of coil 2 and before comparing unshakable in one's determination 3 near the position of axial direction side, be formed as tubular；Bar 5, Which is set to can axially move in bar through hole 3c；Armature 6, which is arranged at the outer circumferential side of bar 5, is set in back core 4 Inner circumferential side and front unshakable in one's determination 3 armature incorporating section 3e in together can axially move with bar 5, with cylindrical portion 1a, front unshakable in one's determination 3 and after Unshakable in one's determination 4 magnetic circuits for together forming the magnetic field that coil 2 is produced；Sleeve 7, which is formed by nonmagnetic substance, unshakable in one's determination little including being arranged at Between footpath portion 3a and coil 2 and be formed as the sleeve large-diameter portion 7a of tubular, be arranged between back core 4 and armature 6 and tubular ground Be formed as the diameter sleeve minor diameter part 7b less than sleeve large-diameter portion 7a, be arranged between sleeve large-diameter portion 7a and sleeve minor diameter part 7b And the sleeve stage portion that the axial end side of an axially side end and sleeve minor diameter part 7b of sleeve large-diameter portion 7a is connected 7c；Spring 12 (force application apparatus), which is to armature 6 from axially one lateral axial direction opposite side force.
Thus, stage portion is not provided with the inner peripheral surface of coil 2, can be by coil 2 so that inner peripheral surface and outer peripheral face are whole Be formed as tubular with approximately axially parallel mode on axial direction.Therefore, the winding of coil 2 is easily carried out, stacking precision can be made It is stable, the manufacture of coil is easily carried out, can be by 2 miniaturization of coil.
(10) steering operation of steering wheel 30 is delivered to deflecting roller 41 by a kind of oil pump 44 (variable displacement pump), and Booster cylinder 37 (steering device for motor vehicle) the supply working solution of power steering, bag are produced to the hydraulic pressure by working solution Include：Pump case 49, which has pump part incorporating section 48；Drive shaft 50, its e axle supporting is in pump case 49；The stator 47 of ring-type, which is removable Pump part incorporating section 48 is arranged at dynamicly；Rotor 45, blade 46 and stator 47 (pump part), they are arranged in stator 47, will The working solution sucked by the rotation driving of drive shaft 50 is discharged, and as stator 47 is relative to the offset of drive shaft 50 Change, make the i.e. intrinsic output change of the delivery flow of every revolution；Solenoid 53, which is carried out according to the change of turn on angle The offset of drive control and control stator 47；Wherein, solenoid 53 is provided with：Solenoid shell 1, which is by magnetic material shape Into with cylindrical portion 1a, axial side is blocked；Coil 2, which is accommodated in solenoid shell 1, so that inner peripheral surface and outer peripheral face Be formed as tubular with approximately axially parallel mode on whole axial direction, magnetic field is produced by being fed with electric current；Front unshakable in one's determination 3, Which is arranged at the axial opposite side of cylindrical portion 1a, is formed by magnetic material, including the path unshakable in one's determination of the inner circumferential side for being configured at coil 2 Portion 3a, the axial another side for being configured at coil 2 and the large-diameter portion 3b unshakable in one's determination being continuously formed with minor diameter part 3a unshakable in one's determination, vertically By the bar through hole 3c of minor diameter part 3a unshakable in one's determination and large-diameter portion 3b insertions unshakable in one's determination, it is arranged at the axially side end of minor diameter part 3a unshakable in one's determination And the armature incorporating section 3e with concave shape, be arranged at armature incorporating section 3e outer circumferential side annulus i.e. with external diameter from axially one The tapering 3f that the mode that lateral axial direction opposite side gradually increases is formed, and form the magnetic circuit in the magnetic field that coil 2 is produced；Back core 4, Which is arranged at the axial side of cylindrical portion 1a, is formed by magnetic material, is configured at the inner circumferential side of coil 2 and compares front unshakable in one's determination 3 and leans on The paraxial position to side, is formed as tubular；Bar 5, which is set to can axially move in bar through hole 3c；Armature 6, which sets Be placed in the outer circumferential side of bar 5, be set to the inner circumferential side of back core 4 and front unshakable in one's determination 3 armature incorporating section 3e in together can edge with bar 5 Axial movement, together forms the magnetic circuit in the magnetic field of the generation of coil 2 with cylindrical portion 1a, front unshakable in one's determination 3 and back core 4；Sleeve 7, its by Nonmagnetic substance is formed, including being arranged between minor diameter part 3a unshakable in one's determination and coil 2 and be formed as the sleeve large-diameter portion 7a of tubular, set Be placed between back core 4 and armature 6 and tubular be formed as the diameter sleeve minor diameter part 7b less than sleeve large-diameter portion 7a, be arranged at Between sleeve large-diameter portion 7a and sleeve minor diameter part 7b and by an axially side end and sleeve minor diameter part 7b of sleeve large-diameter portion 7a Sleeve stage portion 7c of axial end side connection；Valve casing 8, which has the axial opposite side for being arranged at front iron core 3 and along axle It is guiding valve incorporating section 8a, formed in the way of being open and connecting with bar through hole 3c to guiding valve incorporating section 8a to the hole portion for extending Fluid path 8b；Guiding valve 9, which is arranged in the 8a of guiding valve incorporating section, is axially moveable which by bar 5, the liquid with valve casing 8 The flowing of path 8b working solutions together to flowing in valve casing 8 is controlled；Seal member 10 (the first seal member), which will Seal between minor diameter part 3a unshakable in one's determination and sleeve large-diameter portion 7a；Seal member 11 (the second seal member), which is by back core 4 and sleeve Seal between minor diameter part 7b；Spring 12 (force application apparatus), which is to armature 6 from axially one lateral axial direction opposite side force.
Thus, stage portion is not provided with the inner peripheral surface of coil 2, can be by coil 2 so that inner peripheral surface and outer peripheral face are whole Be formed as tubular with approximately axially parallel mode on axial direction.Therefore, the winding of coil 2 is easily carried out, stacking precision can be made It is stable, the manufacture of coil is easily carried out, can be by 2 miniaturization of coil.
Even if in addition, armature 6 and front unshakable in one's determination 3 is close to, it is also possible to reduce the increase of the captivation of axial direction, it is also possible to improve ratio Example valve is the proportionality precision of electromagnetic valve 51.
(other embodiment)
Described the present invention based on first embodiment above, but the concrete composition of each invention is not limited to each enforcement Example, even if design alteration etc. has been carried out in the range of without departing from spirit, is also contained in the present invention.
For example, in the first embodiment, electromagnetic valve 51 is applied to into variable displacement vane pump i.e. oil pump 44, but can be also answered For the proportioning valve used by other equipment.
Below, the technological thought beyond the invention that will can be grasped from above-described embodiment is together illustrated with its effect.
(A) feature of the electromagnetic valve described in second aspect of the invention is,
Second seal member is with the inner peripheral surface contiguity with the outer peripheral face and the back core of the sleeve minor diameter part Mode is configured between the sleeve minor diameter part and the back core.
Thus, the working solution from 7 internal leakage of valve casing lateral sleeves hydraulic action in the case of sleeve minor diameter part, Its hydraulic pressure is delivered to back core via seal member, therefore, it is possible to mitigate the load for putting on sleeve 7, can suppress the change of sleeve Shape.
(B) feature of the electromagnetic valve described in above-mentioned (A) is,
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as diameter than the sleeve The little sealing maintaining part of minor diameter part,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
Thus, even if the second seal member is installed between sleeve minor diameter part and back core, it is also possible to make sleeve path Portion and back core are close to.Therefore, it is possible to suppress the air gap (footpath between the armature and back core of the inner circumferential for being accommodated in sleeve minor diameter part To gap), the magnetic force from back core to armature can be suppressed to reduce.
(C) feature of the electromagnetic valve described in first aspect of the invention is,
The solenoid shell has the axial side and the axial direction one with the sleeve for being arranged at the solenoid shell The relative face of side end is bottom surface,
The axial end side of the sleeve be configured to it is relative with an axially side end face of the large-diameter portion unshakable in one's determination,
The sleeve is formed as the axial length of the sleeve than the bottom surface and the axial side of the large-diameter portion unshakable in one's determination Axial length between end face is short.
Thus, even if act on the stress for having hydraulic pressure to cause on front iron core, it is also possible to prevent sleeve to be sandwiched in front iron core The deformation of sleeve and solenoid shell between, can be suppressed.
(D) feature of the electromagnetic valve described in first aspect of the invention is,
The back core is integrally formed with the solenoid hull shape.
Thus, miscellaneous operations such as welding can be saved.
(E) feature of the electromagnetic valve described in first aspect of the invention is have：
The be arranged at the state of compression between an axially side end of the coil and the solenoid shell Three seal members,
It is arranged between the axial end side of the coil and the large-diameter portion unshakable in one's determination with the state of compression 4th seal member,
3rd seal member is assembled with the compression ratio different from the compression ratio of the 4th seal member.
Thus, coil to be carried out to a direction by pressured state, rocking therefore, it is possible to suppression coil.
(F) feature of the solenoid described in fourth aspect of the invention is,
The outer circumferential side of the axial end side of the back core has between the inner peripheral surface of the cylindrical portion can be inserted Enter the peristome of the coil,
The axial end side of back core inner circumferential side unshakable in one's determination in the rear has the pluggable sleeve path The peristome in portion,
The axial end side of the sleeve has the peristome that can be inserted into the armature and the minor diameter part unshakable in one's determination.
Thus, coil, armature, sleeve, front iron core can be assembled from axial opposite side, therefore, it is possible to improve group Dress property.
(G) feature of the solenoid described in above-mentioned (F) is,
Second seal member is with the inner peripheral surface contiguity with the outer peripheral face and the back core of the sleeve minor diameter part Mode is configured between the sleeve minor diameter part and the back core.
Thus, the working solution from valve casing lateral sleeves internal leakage hydraulic action in the case of sleeve minor diameter part, Its hydraulic pressure is delivered to back core via seal member, therefore, it is possible to mitigate the load for putting on sleeve, can suppress the change of sleeve Shape.
(H) feature of the solenoid described in above-mentioned (G) is,
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as diameter than the sleeve The little sealing maintaining part of minor diameter part,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
Thus, even if seal member is installed between sleeve minor diameter part and back core, it is also possible to make sleeve minor diameter part and Back core is close to.Therefore, it is possible to suppress the air gap between the armature and back core of the inner circumferential for being accommodated in sleeve minor diameter part (between radially Gap), the magnetic force from back core to armature can be suppressed to reduce.
(I) feature of the solenoid described in fourth aspect of the invention is,
The solenoid shell has the axial side and the axial direction one with the sleeve for being arranged at the solenoid shell The relative face of side end is bottom surface,
The axial end side of the sleeve be configured to it is relative with an axially side end face of the large-diameter portion unshakable in one's determination,
The sleeve is formed as the axial length of the sleeve than the bottom surface and the axial side of the large-diameter portion unshakable in one's determination Axial length between end face is short.
Thus, even if act on the stress for having hydraulic pressure to cause on front iron core, it is also possible to prevent sleeve to be sandwiched in front iron core The deformation of sleeve and solenoid shell between, can be suppressed.
(J) feature of the solenoid described in fourth aspect of the invention is,
The sleeve stage portion is formed as the radius of the sleeve stage portion from the lateral sleeve of the sleeve large-diameter portion The taper that minor diameter part side is gradually reduced,
The back core is formed as the internal diameter of the axial end side of the back core from axially another lateral axial direction one The taper that side is gradually reduced.
Thus, it is possible to the deeper inside configuration sleeve stage portion of back core, the front iron core being accommodated in sleeve can be compared It is configured near the position of back core side.Thus, it is possible to increase back core and front lap unshakable in one's determination, magnetic field can be suppressed Saturation.
(K) feature of the solenoid described in fourth aspect of the invention is,
The back core is integrally formed with the solenoid hull shape.
Thus, miscellaneous operations such as welding can be saved.
(L) feature of the solenoid described in fourth aspect of the invention is have：
The be arranged at the state of compression between an axially side end of the coil and the solenoid shell Three seal members,
It is arranged between the axial end side of the coil and the large-diameter portion unshakable in one's determination with the state of compression 4th seal member,
3rd seal member is assembled with the compression ratio different from the compression ratio of the 4th seal member.
Thus, coil to be assembled to a direction by pressured state, rocking therefore, it is possible to suppression coil.
(M) feature of the variable displacement pump described in fifth aspect of the invention is,
The outer circumferential side of the axial end side of the back core has between the inner peripheral surface of the cylindrical portion can be inserted Enter the peristome of the coil,
The axial end side of back core inner circumferential side unshakable in one's determination in the rear has the pluggable sleeve path The peristome in portion,
The axial end side of the sleeve has the peristome that can be inserted into the armature and the minor diameter part unshakable in one's determination.
Thus, coil, armature, sleeve, front iron core can be assembled from axial opposite side, therefore, it is possible to improve group Dress property.
(N) feature of the variable displacement pump described in above-mentioned (M) is,
Second seal member is with the inner peripheral surface contiguity with the outer peripheral face and the back core of the sleeve minor diameter part Mode is configured between the sleeve minor diameter part and the back core.
Thus, the working solution from valve casing lateral sleeves internal leakage hydraulic action in the case of sleeve minor diameter part, Its hydraulic pressure is delivered to back core via the second seal member, therefore, it is possible to mitigate the load for putting on sleeve, can suppress sleeve Deformation.
(O) feature of the variable displacement pump described in above-mentioned (N) is,
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as diameter than the sleeve The little sealing maintaining part of minor diameter part,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
Thus, even if seal member is installed between sleeve minor diameter part and back core, it is also possible to make sleeve minor diameter part and Back core is close to.Therefore, it is possible to suppress the air gap between the armature and back core of the inner circumferential for being accommodated in sleeve minor diameter part (between radially Gap), the magnetic force from back core to armature can be suppressed to reduce.

Claims (20)

1. a kind of electromagnetic valve, it is characterised in that have：
Solenoid shell, which is formed by magnetic material, and with cylindrical portion, axial side is blocked；
Coil, which is accommodated in the solenoid shell so that inner peripheral surface and outer peripheral face on whole axial direction with approximately axially put down Capable mode is formed as tubular, produces magnetic field by being fed with electric current；
Front iron core, which is arranged at the axial opposite side of the cylindrical portion, is formed by magnetic material, including being configured at the coil The minor diameter part unshakable in one's determination of inner circumferential side, the axially side for being configured at the coil and the ferrum being continuously formed with the minor diameter part unshakable in one's determination Heart large-diameter portion, vertically by the bar through hole of the minor diameter part unshakable in one's determination and the large-diameter portion insertion unshakable in one's determination, be arranged at the iron core An axially side end of minor diameter part and the armature incorporating section with concave shape, be arranged at the armature incorporating section outer circumferential side ring The tapering that shape portion is formed in the way of external diameter gradually increases from one lateral axial direction opposite side of axial direction, and the front formation unshakable in one's determination The magnetic circuit in the magnetic field that the coil is produced；
Back core, which is arranged at the axial side of the cylindrical portion, is formed by magnetic material, is configured at the inner circumferential side of the coil And the front position near axial direction side unshakable in one's determination is compared, be formed as tubular；
Bar, which is set to be axially moveable in the bar through hole；
Armature, which is arranged at the outer circumferential side of the bar, is set to inner circumferential side unshakable in one's determination in the rear and the front armature unshakable in one's determination Can together be axially moveable with the bar in incorporating section, with the cylindrical portion, front unshakable in one's determination and described one similar shape of back core The magnetic circuit in the magnetic field produced into the coil；
Sleeve, which is formed by nonmagnetic substance, including being arranged between the minor diameter part unshakable in one's determination and the coil and be formed as cylinder The sleeve large-diameter portion of shape, be arranged between the back core and the armature and tubular be formed as diameter than the big footpath of the sleeve The little sleeve minor diameter part in portion, it is arranged between the sleeve large-diameter portion and the sleeve minor diameter part and by the sleeve large-diameter portion The sleeve stage portion that axially the axial end side of a side end and the sleeve minor diameter part connects；
Valve casing, which has guiding valve incorporating section and fluid path, the guiding valve incorporating section be arranged at it is described before axial side unshakable in one's determination and As the hole portion for axially extending, side of the fluid path to connect to guiding valve incorporating section opening and with the bar through hole Formula is formed；
Guiding valve, which is arranged in the guiding valve incorporating section, is axially moveable the guiding valve by the bar, the guiding valve and the valve The fluid path of shell together controls the flowing of the working solution flowed in the valve casing；
First seal member, which will be sealed between minor diameter part unshakable in one's determination and the sleeve large-diameter portion；
Second seal member, which will be sealed between back core and the sleeve minor diameter part；
Force application apparatus, which exerts a force from axially one lateral axial direction opposite side to the armature,
The inner circumferential of the periphery of the sleeve minor diameter part and the back core is touched.
2. electromagnetic valve as claimed in claim 1, it is characterised in that
The outer circumferential side of the axial one end of the back core is described with being inserted between the inner peripheral surface of the cylindrical portion The peristome of coil,
The axial one end of back core inner circumferential side unshakable in one's determination in the rear has and is inserted into opening for the sleeve minor diameter part Oral area,
The axial one end of the sleeve has the peristome for being inserted into the armature and the minor diameter part unshakable in one's determination.
3. electromagnetic valve as claimed in claim 2, it is characterised in that
Second seal member is in the way of the inner peripheral surface with the outer peripheral face and the back core of the sleeve minor diameter part touches It is configured between the sleeve minor diameter part and the back core.
4. electromagnetic valve as claimed in claim 3, it is characterised in that
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as external diameter than the sleeve path The little sealing maintaining part in portion,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
5. electromagnetic valve as claimed in claim 1, it is characterised in that
The solenoid shell has the axial side and the axially side with the sleeve for being arranged at the solenoid shell The relative face in portion is bottom surface,
The axial end side of the sleeve be configured to it is relative with an axially side end face of the large-diameter portion unshakable in one's determination,
The sleeve is formed as the axial length of the sleeve than the bottom surface and an axially side end face of the large-diameter portion unshakable in one's determination Between axial length it is short.
6. electromagnetic valve as claimed in claim 1, it is characterised in that
The sleeve stage portion is formed as the radius of the sleeve stage portion from the lateral sleeve path of the sleeve large-diameter portion The taper that portion side is gradually reduced,
The back core is formed as the internal diameter of the axial one end of the back core and gradually subtracts from axially another lateral axial side Little taper.
7. electromagnetic valve as claimed in claim 1, it is characterised in that
The back core is integrally formed with the solenoid hull shape.
8. electromagnetic valve as claimed in claim 1, it is characterised in that
With the 3rd seal member and the 4th seal member, the 3rd seal member is arranged at the line with the state of compression Between one side end of axial direction of circle and the solenoid shell, the 4th seal member is arranged at described with the state of compression Between the axial end side of coil and the large-diameter portion unshakable in one's determination,
3rd seal member is assembled with the compression ratio different from the compression ratio of the 4th seal member.
9. a kind of solenoid, it is characterised in that have：
Solenoid shell, which is formed by magnetic material, and with cylindrical portion, axial side is blocked；
Coil, which is accommodated in the solenoid shell so that inner peripheral surface and outer peripheral face on whole axial direction with approximately axially put down Capable mode is formed as tubular, produces magnetic field by being fed with electric current；
Front iron core, which is arranged at the axial opposite side of the cylindrical portion, is formed by magnetic material, including being configured at the coil The minor diameter part unshakable in one's determination of inner circumferential side, the axially side for being configured at the coil and the ferrum being continuously formed with the minor diameter part unshakable in one's determination Heart large-diameter portion, vertically by the bar through hole of the minor diameter part unshakable in one's determination and the large-diameter portion insertion unshakable in one's determination, be arranged at the iron core An axially side end of minor diameter part and the armature incorporating section with concave shape, be arranged at the armature incorporating section outer circumferential side ring The tapering that shape portion is formed in the way of external diameter gradually increases from one lateral axial direction opposite side of axial direction, and the front formation unshakable in one's determination The magnetic circuit in the magnetic field that the coil is produced；
Back core, which is arranged at the axial side of the cylindrical portion, is formed by magnetic material, is configured at the inner circumferential side of the coil And the front position near axial direction side unshakable in one's determination is compared, be formed as tubular；
Bar, which is set to be axially moveable in the bar through hole；
Armature, which is arranged at the outer circumferential side of the bar, is set to inner circumferential side unshakable in one's determination in the rear and the front armature unshakable in one's determination Can together be axially moveable with the bar in incorporating section, with the cylindrical portion, front unshakable in one's determination and described one similar shape of back core The magnetic circuit in the magnetic field produced into the coil；
Sleeve, which is formed by nonmagnetic substance, including being arranged between the minor diameter part unshakable in one's determination and the coil and be formed as cylinder The sleeve large-diameter portion of shape, be arranged between the back core and the armature and tubular be formed as diameter than the big footpath of the sleeve The little sleeve minor diameter part in portion, it is arranged between the sleeve large-diameter portion and the sleeve minor diameter part and by the sleeve large-diameter portion The sleeve stage portion that axially the axial end side of a side end and the sleeve minor diameter part connects；
Force application apparatus, which exerts a force from axially one lateral axial direction opposite side to the armature,
The inner circumferential of the periphery of the sleeve minor diameter part and the back core is touched.
10. solenoid as claimed in claim 9, it is characterised in that
The outer circumferential side of the axial one end of the back core is described with being inserted between the inner peripheral surface of the cylindrical portion The peristome of coil,
The axial one end of back core inner circumferential side unshakable in one's determination in the rear has and is inserted into opening for the sleeve minor diameter part Oral area,
The axial one end of the sleeve has the peristome for being inserted into the armature and the minor diameter part unshakable in one's determination.
11. solenoids as claimed in claim 10, it is characterised in that
The solenoid with the second seal member that will be sealed between the back core and the sleeve minor diameter part,
Second seal member is in the way of the inner peripheral surface with the outer peripheral face and the back core of the sleeve minor diameter part touches It is configured between the sleeve minor diameter part and the back core.
12. solenoids as claimed in claim 11, it is characterised in that
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as external diameter than the sleeve path The little sealing maintaining part in portion,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
13. solenoids as claimed in claim 9, it is characterised in that
The solenoid shell has the axial side and the axially side with the sleeve for being arranged at the solenoid shell The relative face in portion is bottom surface,
The axial end side of the sleeve be configured to it is relative with an axially side end face of the large-diameter portion unshakable in one's determination,
The sleeve is formed as the axial length of the sleeve than the bottom surface and an axially side end face of the large-diameter portion unshakable in one's determination Between axial length it is short.
14. solenoids as claimed in claim 9, it is characterised in that
The sleeve stage portion is formed as the radius of the sleeve stage portion from the lateral sleeve path of the sleeve large-diameter portion The taper that portion side is gradually reduced,
The back core is formed as the internal diameter of the axial one end of the back core and gradually subtracts from axially another lateral axial side Little taper.
15. solenoids as claimed in claim 9, it is characterised in that
The back core is integrally formed with the solenoid hull shape.
16. solenoids as claimed in claim 9, it is characterised in that
With the 3rd seal member and the 4th seal member, the 3rd seal member is arranged at the line with the state of compression Between one side end of axial direction of circle and the solenoid shell, the 4th seal member is arranged at described with the state of compression Between the axial end side of coil and the large-diameter portion unshakable in one's determination,
3rd seal member is assembled with the compression ratio different from the compression ratio of the 4th seal member.
A kind of 17. variable displacement pumps, the steering operation of steering wheel is delivered to deflecting roller by which, and to by the liquid of working solution The steering device for motor vehicle supply working solution of pressure and generation power steering, it is characterised in that have：
Pump case, which has pump part incorporating section；
Drive shaft, which is pivotally supported on the pump case；
The stator of ring-type, which can movably be arranged at the pump part incorporating section；
Pump part, which is arranged in the stator, and the working solution that the rotation driving by the drive shaft is sucked is discharged, and And as the stator makes the i.e. intrinsic discharge of the delivery flow of every revolution relative to the change of the offset of the drive shaft Amount change；
Solenoid, which is driven control according to the change of turn on angle, controls the offset of the stator；
The solenoid has：
Solenoid shell, which is formed by magnetic material, and with cylindrical portion, axial side is blocked；
Coil, which is accommodated in the solenoid shell so that inner peripheral surface and outer peripheral face on whole axial direction with approximately axially put down Capable mode is formed as tubular, produces magnetic field by being fed with electric current；
Front iron core, which is arranged at the axial opposite side of the cylindrical portion, is formed by magnetic material, including being configured at the coil The minor diameter part unshakable in one's determination of inner circumferential side, the axially side for being configured at the coil and the ferrum being continuously formed with the minor diameter part unshakable in one's determination Heart large-diameter portion, vertically by the bar through hole of the minor diameter part unshakable in one's determination and the large-diameter portion insertion unshakable in one's determination, be arranged at the iron core An axially side end of minor diameter part and the armature incorporating section with concave shape, be arranged at the armature incorporating section outer circumferential side ring The tapering that shape portion is formed in the way of external diameter gradually increases from axially one lateral axial direction opposite side, and form the coil product The magnetic circuit in raw magnetic field；
Back core, which is arranged at the axial side of the cylindrical portion, is formed by magnetic material, is configured at the inner circumferential side of the coil And the front position near axial direction side unshakable in one's determination is compared, be formed as tubular；
Bar, which is set to be axially moveable in the bar through hole；
Armature, which is arranged at the outer circumferential side of the bar, is set to inner circumferential side unshakable in one's determination in the rear and the front armature unshakable in one's determination Can together be axially moveable with the bar in incorporating section, with the cylindrical portion, front unshakable in one's determination and described one similar shape of back core The magnetic circuit in the magnetic field produced into the coil；
Sleeve, which is formed by nonmagnetic substance, including being arranged between the minor diameter part unshakable in one's determination and the coil and be formed as cylinder The sleeve large-diameter portion of shape, be arranged between the back core and the armature and tubular be formed as diameter than the big footpath of the sleeve The little sleeve minor diameter part in portion, it is arranged between the sleeve large-diameter portion and the sleeve minor diameter part and by the sleeve large-diameter portion The sleeve stage portion that axially the axial end side of a side end and the sleeve minor diameter part connects；
Valve casing, which has guiding valve incorporating section and fluid path, the guiding valve incorporating section be arranged at it is described before axial side unshakable in one's determination and Used as the hole portion for axially extending, the fluid path is connecting to guiding valve incorporating section opening and with the bar through hole Mode is formed；
Guiding valve, which is arranged in the guiding valve incorporating section, is axially moveable the guiding valve by the bar, the guiding valve and the valve The fluid path of shell together controls the flowing of the working solution flowed in the valve casing, so as to control the offset of the stator；
First seal member, which will be sealed between minor diameter part unshakable in one's determination and the sleeve large-diameter portion；
Second seal member, which will be sealed between back core and the sleeve minor diameter part；
Force application apparatus, which exerts a force from axially one lateral axial direction opposite side to the armature,
The inner circumferential of the periphery of the sleeve minor diameter part and the back core is touched.
18. variable displacement pumps as claimed in claim 17, it is characterised in that
The outer circumferential side of the axial one end of the back core is described with being inserted between the inner peripheral surface of the cylindrical portion The peristome of coil,
The axial one end of back core inner circumferential side unshakable in one's determination in the rear has and is inserted into opening for the sleeve minor diameter part Oral area,
The axial one end of the sleeve has the peristome for being inserted into the armature and the minor diameter part unshakable in one's determination.
19. variable displacement pumps as claimed in claim 18, it is characterised in that
Second seal member is in the way of the inner peripheral surface with the outer peripheral face and the back core of the sleeve minor diameter part touches It is configured between the sleeve minor diameter part and the back core.
20. variable displacement pumps as claimed in claim 19, it is characterised in that
The sleeve has the axially side end for being arranged at the sleeve minor diameter part and is formed as external diameter than the sleeve path The little sealing maintaining part in portion,
Second seal member is configured to the outer peripheral face contiguity with the sealing maintaining part.
CN201210057167.2A 2011-07-28 2012-03-06 Solenoid valve, solenoid and variable volume pump Expired - Fee Related CN102900882B (en)

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JP2011165128A JP5711628B2 (en) 2011-07-28 2011-07-28 Solenoid valves, solenoids and variable displacement pumps
JP2011-165128 2011-07-28

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US8556022B2 (en) 2013-10-15
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JP5711628B2 (en) 2015-05-07
JP2013029147A (en) 2013-02-07

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